A new report card on the nation’s major restaurant chains shows that most continue to get a failing grade when it comes to serving beef raised without the routine use of medically important antibiotics.

The fifth annual Chain Reaction report, which evaluates and grades the top 25 US restaurant chains on their policies and practices on antibiotic use in the meat they serve, finds that only two—Chipotle and Panera—are serving beef raised under responsible antibiotic use practices, earning them grades in the “A” range. Fifteen other chains earned “F” grades for not having any public policy to source beef raised without routine use of antibiotics.

Four other chains—McDonald’s, Wendy’s, Subway, and Taco Bell—earned low but passing grades for making moves toward more responsible use of antibiotics in their beef supply. The most significant of these moves came in December 2018, when McDonald’s announced that it would begin measuring antibiotic use in its global beef supply chain and set reduction targets by 2020, which earned the company a “C” grade. Wendy’s received a “D +” for committing to reduced use of only one medically important antibiotic used in cattle.

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